mirror of https://github.com/hak5/openwrt-owl.git
62 lines
1.9 KiB
Diff
62 lines
1.9 KiB
Diff
--- a/drivers/mtd/bcm47xxpart.c
|
|
+++ b/drivers/mtd/bcm47xxpart.c
|
|
@@ -19,6 +19,12 @@
|
|
/* 10 parts were found on sflash on Netgear WNDR4500 */
|
|
#define BCM47XXPART_MAX_PARTS 12
|
|
|
|
+/*
|
|
+ * Amount of bytes we read when analyzing each block of flash memory.
|
|
+ * Set it big enough to allow detecting partition and reading important data.
|
|
+ */
|
|
+#define BCM47XXPART_BYTES_TO_READ 0x404
|
|
+
|
|
/* Magics */
|
|
#define BOARD_DATA_MAGIC 0x5246504D /* MPFR */
|
|
#define POT_MAGIC1 0x54544f50 /* POTT */
|
|
@@ -57,17 +63,14 @@ static int bcm47xxpart_parse(struct mtd_
|
|
struct trx_header *trx;
|
|
int trx_part = -1;
|
|
int last_trx_part = -1;
|
|
- int max_bytes_to_read = 0x8004;
|
|
|
|
if (blocksize <= 0x10000)
|
|
blocksize = 0x10000;
|
|
- if (blocksize == 0x20000)
|
|
- max_bytes_to_read = 0x18004;
|
|
|
|
/* Alloc */
|
|
parts = kzalloc(sizeof(struct mtd_partition) * BCM47XXPART_MAX_PARTS,
|
|
GFP_KERNEL);
|
|
- buf = kzalloc(max_bytes_to_read, GFP_KERNEL);
|
|
+ buf = kzalloc(BCM47XXPART_BYTES_TO_READ, GFP_KERNEL);
|
|
|
|
/* Parse block by block looking for magics */
|
|
for (offset = 0; offset <= master->size - blocksize;
|
|
@@ -82,7 +85,7 @@ static int bcm47xxpart_parse(struct mtd_
|
|
}
|
|
|
|
/* Read beginning of the block */
|
|
- if (mtd_read(master, offset, max_bytes_to_read,
|
|
+ if (mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ,
|
|
&bytes_read, (uint8_t *)buf) < 0) {
|
|
pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
|
|
offset);
|
|
@@ -97,16 +100,9 @@ static int bcm47xxpart_parse(struct mtd_
|
|
}
|
|
|
|
/* Standard NVRAM */
|
|
- if (buf[0x000 / 4] == NVRAM_HEADER ||
|
|
- buf[0x1000 / 4] == NVRAM_HEADER ||
|
|
- buf[0x8000 / 4] == NVRAM_HEADER ||
|
|
- (blocksize == 0x20000 && (
|
|
- buf[0x10000 / 4] == NVRAM_HEADER ||
|
|
- buf[0x11000 / 4] == NVRAM_HEADER ||
|
|
- buf[0x18000 / 4] == NVRAM_HEADER))) {
|
|
+ if (buf[0x000 / 4] == NVRAM_HEADER) {
|
|
bcm47xxpart_add_part(&parts[curr_part++], "nvram",
|
|
offset, 0);
|
|
- offset = rounddown(offset, blocksize);
|
|
continue;
|
|
}
|
|
|